How to randomly draw something once in love2d

I'm currently trying to create brick breaker using love2d but the problem is whenever is used math.random() to generate random bricks the love application keeps running it multiple times and the brick moves constantly. So I changed and I tried initializing a random variable in load function and in the draw function if the value equates then it draws the bricks

My code

if math.random(2) == 1 then
        line2 = 1
    end

this in the load function

for y = 0, VIRTUAL_HEIGHT- 4, 10 do
        if line2 == 1 then
            love.graphics.rectangle('line', VIRTUAL_WIDTH - 10, y, 5, 10)
        end
end

and this in the draw function NOTE- line2 is initialized to 0 in the start. Please Help!!!